4 Communal heating systems review PDF 104 KB
Decision:
RESOLVED: That the comments and
evidence be noted for the Review.
Minutes:
4.1
Bertie Dixon (Engineer from Max
Fordham) made a presentation to the Committee. The key points to
note were:
- Max Fordham LLP is a
consultancy specialising in engineering and construction, who have
been in business for over 50 years. They have worked with numerous
local authority housing developments, including projects in
Lewisham such as Milton Court. They have installed and refurbished
all types of heating system in that period, and followed up the
results where possible.
- The common
description for ‘district’ or communal heating system
that operates many houses or buildings, like a housing estates or
shopping centres from one central boiler plant. The conventional
system is the boiler system where you have one boiler per
flat/house
- The general
convention since the 1980s has been to fit individual boilers
rather than communal heating when constructing housing
developments. However, in the last 10 years there has been a move
to fit communal heating systems.
- This is due to the
very strong policy position that has developed that combined heat
and power is the most efficient way to generate heat. The Greater London Authority (GLA) & in turn
local councils now all but require communal heating systems in
major housing developments in London, and strongly encourage
combined heat and power. Max Fordham
LLP believes that there is an ‘gap in understanding’ in
the information that has led to this policy position held by the
GLA and others, on the operational use of communal heating systems
and the inappropriate use of small scale combined heat and power
units.
- Government published
calculation methods used for building control and planning state
that there is a 5% loss in energy with communal heating systems;
but Max Fordham LLP own calculations state that for new flat
developments it is more like 50%-70%. Losses as low as 30% are
possible but with unusually high standards of design and
installation. This causes higher carbon
emissions, significantly higher bills than one would predict using
the government calculator. Furthermore the uncontrolled heat loss
in the distribution system causes overheating with attendant health
risks to the tenants.
- Housing developers
are now expected by planners to install communal heating systems to
meet sustainability requirements for new developments, when better
energy-efficient building would have been a more effective
solution.
- One of the issues is
that policymakers seem not know how inefficient communal heating
systems are, particularly in current UK practice, and seem to be
unaware of the problems that social housing tenants have with these
systems.
4.2 In
response to questions from the Committee, Bertie Dixon made the following further
points:
- With communal heating
systems, the capital costs are substantially higher due to the
increased level of infrastructure, and the running costs are higher
due to the increased fuel used, maintenance and management. Bills
are generally much lower for the tenant with a single boiler system
in their dwelling.
- Housing developers do
have an option not to install communal heating systems if they so
wish, especially if they build more energy-efficient properties.
However the policy ...
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